Definition of Electrochemical series
Electrochemical series is a series of chemical elements that are arranged according to their standard electrode potential.
Elements that tend to lose electrons to their solution more than hydrogen are taken as electropositive;
those that gain electrons from their solution are called electronegative in the series below hydrogen.
The series shows the order in which metals from their salts replace each other;
electropositive metals replace acid hydrogen.
More information about Electrochemical series